He DID do that, didn't he? Lol
Um...he used the same voice to Miri, IIRC, when he told her she was pretty. I know he wasn't trying to actually seduce her, but he was really playing her emotions. Kinda sucks when you think about it.
He's a consummate professional at seducing people into his influence to get what he wants, he just applies it almost exclusively to women. Janeway turns it on for everybody
And that's just one reason why I think Janeway is most similar to Kirk.